P0600

DTC PO6OO
SERIAL COMMUNICATION LINK MALFUNCTION

Description
The serial communication link circuit monitors data communication between scan tool and Engine Control Module (ECM).

DTC Detecting Condition.
Two consecutive trips with fault.











1. Check harness.





a. Turn ignition switch to"OFF".
b. Disconnect connector from ECM.
c. Measure resistance of harness connector between ECM and data link connector (for OBD-II General Scan Tool).
[CHECK]: Connector & terminal:
(B84) No. 41 - (B40) No. 10/10 Ohms or less.
[NO]: Repair open circuit of harness between ECM connector and data link connector.
[YES]: Go to the next step.





d. Measure resistance between ECM harness connector and body.
[CHECK]: Connector & terminal:
(B84) No. 41 - Body/10 Ohms or less.
[YES]: Repair short circuit of harness between ECM connector and data link connector.
[NO]: Repair poor contact in ECM connector and data link connector.